Office: 2235 NPB

Lab: B-134/138

Neil Sullivan



PhD Harvard University (1972)

Research Group

Condensed Matter Experiment/MAG Lab

Research Interests

Research interests are focused on studies of collective order/disorder processes, quantum diffusion and defect formation in quantum solids and fluids. Current activites include: (1) Studies of order/disorder processes in solid hydrogen, diffusion of vacancies and isotopic impurities in solid H2, solid 3He and 4He. (2) NMR investigations of solids at very high magnetic fields with National High Magetic Field Laboratory and UF Microkelvin Laboratory. (3) Search for axions as candidates of galactic halo dark matter (in collaboration with David Tanner and Pierre Sikivie).

Selected Publications

N. S. Sullivan, D. Candela, S. S. Kim, C. Huan, Y. Lin and J. S. Xia, Lattice Relaxation in Solid 4He: Effect on Dynamics of 3He Impurities, J. Low Temp. Phys. 175, 133-139 (2014).

W. Pan, A. Serafin, J. S. Xia, L. Yin, N. S. Sullivan, K. W. Baldwin and K. W. West, Competing quantum Hall phases in the second Landau level in low density limit, Phys Rev. B 89,241302® (2014).

S. S. Kim, C. Huan, J. S. Xia, L. Yin, D. Candela and N. S. Sullivan, NMR Investigation of the Dynamics of Solid 4He doped with 3He Impurities, Phys. Rev B87, 224303 (2013).

Yu Ji, N. S. Sullivan, Y. Tang and J. A. Hamida, Interactions and Diffusion of Methane and Hydrogen in Microporous Structures: Nuclear Magnetic Resonance (NMR) Studies, Materials 6(6), 2464-2482(2013).

L. Yin, J. S. Xia, Y. Takano, N. S. Sullivan, Q. J. Li, and X. F. Sun, Low-Temperature Low-Field Phases of the Pyrochlore Quantum Magnet Tb2Ti2O7, Phys Rev Lett. 110, 137201 (2013).

W. Pan, N. Masuhara, N. S. Sullivan, K. W. Baldwin, K. W. West, L. N. Pfeiffer, and D. C. Tsui, Impact of Disorder on the 5/2 Fractional Quantum Hall State, Phys. Rev. Lett., 106, 206806 (2011).

S. S. Kim, C. Huan, L. Yin, J. Xia, D. Candela, and N. S. Sullivan, NMR Study of the Dynamics of 3He Impurities in the Proposed Supersolid State of Solid 4He, Phys. Rev. Lett. 106,185303 (2011).

Yu Ji, N. S. Sullivan and J. A. Hamida, Dynamics of HD Molecules Trapped in Cages of Zeolite, J. Low Temp. Phys. 162, 121-126 (2011).

C. Huan, S. S. Kim, L. Yin, J. S. Xia, D. Candela and N. S. Sullivan, NMR Studies of 3He Droplets in Dilute 3He-4He Solid Solutions, J. Low Temp. Phys. 162, 167-173 (2011).

W. Li, J. S. Xia, C. Vicente, N. S. Sullivan, W. Pan, D. C. Tsui, L. N. Pfeiffer and K. W. West, Crossover from non-universal scaling regime to universal scaling regime in quantum Hall plateau transition, Phys. Rev. B 81, 033305-033309 (2010).

S. S. Kim, C. Huan, L. Yin, J. S. Xia, D. Candela and N. S. Sullivan, NMR Studies of 3He Impurities in 4He in the Proposed Supersolid Phase, J. Low Temp. Phys. 158, 584-589 (2010).

Yu Ji, J. A. Hamida and N. S. Sullivan, NMR Studies of Quantum Rotors Confined in Zeolite, J. Low Temp. Phys. 158, 509-514 (2010).

L. Yin, J. S. Xia, N. S. Sullivan, V. S. Zapf and A. Paduan-Filho, Magnetic Susceptibility Measurements at Ultra-low Temperatures, J. Low Temp. Phys. 158, 710-715 (2010).

C. Huan, S. S. Kim, L. Phelps, J. S. Xia, D. Candela and N. S. Sullivan, A Novel Design of a Low Temperature Preamplifier for Pulsed NMR Experiments of Dilute 3He in Solid 4He, J. Low Temp. Phys. 158, 692-696 (2010).

C. Parks, N.S. Sullivan and P. Stachowiak, Measurements of the Nuclear Spin-Spin Relaxation Times for Commensurate 3He-Ne Films Adsorbed on Hexagonal Boron Nitride, J. Physics (Conf. Series), 150, 032099-032103 (2009).

S. Pilla, J.A. Hamida, K.A. Muttalib, and N.S. Sullivan, Generalized Fluctuation Dissipation and Thermal Hysteresis of Dielectric Susceptibility in Frustrated Molecular Orientational Glasses, J. Physics (Conf. Series) 150, 042192-0421096 (2009).

J.S. Xia, L. Yin, E.D. Adams, and N.S. Sullivan, A Compact Capacitive Pressure Transducer, J. Physics (Conf. Series) 150, 012054-012058 (2009).

L. Yin, J.S. Xia, V.S. Zapf, N.S. Sullivan and A. Paduan-Filho, A direct measurement of the Bose-Einstein Condensation universality class in NiCl2-4SC(NH2)2 at ultra-low temperatures, Phys. Rev. Lett. 101, 187205 (2008).

S. Xia, H. L. Stormer, D.C. Tsui, C. Vicente, E.D. Adams, N.S. Sullivan, L.N. Pfeiffer, K.W. Baldwin, and K.W. West, Experimental studies of the fractional quantum Hall effect in the first excited Landau level, Phys. Rev. B77, 075307-075312 (2008).

M. Pilla, J.A. Hamida, K. Muttalib and N. S. Sullivan, Thermal hysteresis of the dielectric susceptibility of solid oxygen in the audio frequency range, Phys. Rev. B77, 224108-22415 (2008).